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- Title
Charge state effect on K-shell ionization of silicon induced by iodine<sup>q+</sup> ions.
- Authors
Lei, Yu; Cheng, Rui; Zhou, Xianming; Wang, Xing; Wang, Yuyu; Ren, Jieru; Zhao, Yongtao; Ma, Xinwen; Xiao, Guoqing
- Abstract
Abstract: In near Bohr velocity ion-atom collisions, a dependence of target K-shell ionization cross sections upon the ionic charge states has been observed. Experiments were performed in silicon solid target with 2-5 MeV iodineq+ ions incident in charge states +20 to +25. K-shell ionization cross section of silicon for q = 20 and 22 iodine ions impact with the same incident energy are almost equal, and are well described by the theory of binding-energy-modified BEA. However, for q = 25 iodine ions collisions, 3d vacancies of projectile transfer to the 1s orbit of target atom via rotational coupling of 3dπ, δ-3dσ molecular orbits in the framework of quasi-molecular model, which results in an increase of the K-shell ionization cross section of silicon. Graphical abstract: <graphic></graphic>
- Subjects
ION-atom collisions; BOHR frequency; K-shell emission; BINDING energy; IONIZATION (Atomic physics)
- Publication
European Physical Journal D (EPJ D), 2018, Vol 72, Issue 8, p1
- ISSN
1434-6060
- Publication type
Article
- DOI
10.1140/epjd/e2018-80772-0